JPS5869356A - Hot water feeder utilizing solar heat - Google Patents

Abstract

PURPOSE:To make the temperature of hot water in a hot water storage tank uniform by a method wherein in the titled hot water feeder provided with an auxiliary heat source, the high temperature hot water produced by the auxiliary heat source is introduced into the upper part of the hot water storage tank so as to enable the high temperature hot water to be stored in the tank in a short time and in small quantities and also to enable it to circulate by a pump. CONSTITUTION:A hot water circulating passage connecting the hot water storage tank 1 and a solar heat collector 2 includes a route stating from the upper part of the tank 1 and ending with the lower part of the tank 1 via the pump 6, a first electromagnetic valve 12, a forward pipe 4, the solar heat collector 2 and a backward pipe 5 and a route starting from the pump 6 and ending with the lower part of the tank 1 via a second electromagnetic valve 13 provided midway in a bypass pipe 18 connected to the backward pipe 5 at a part just before the valve 13. With the above structure, when solar heat is collected, the water in the upper part of the tank 1 is supplied to the solar heat collector 2 by the pump 6 after the valve 12 is opened and the valve 13 is closed and the hot water is introduced into the lower part of the tank 1. Further, in case where it is required to heat the hot water additionally by the auxiliary heat source 3, the hot water in the tank 1 is circulated by the pump 6 after the valve 12 is closed and the valve 13 is opened, to thereby heat the hot water to an elevated temoerature uniformly and quickly.

Description

[Detailed description of the invention] do.

Conventionally, a solar hot water supply system having an auxiliary heat source has a hot water storage tank 1, a solar heat collector 2, and an auxiliary heat source 3, as shown in FIG.
It was synutemized as the main component. The hot water tank 1 and the solar heat collector 2 are connected by an outgoing pipe 4 and a return pipe 6, and a circulation pump 6 is provided in the middle of the outgoing pipe 4 to circulate water through the solar heat collector 2. Although the return pipe 6 is above the outgoing pipe 4, it is connected to the hot water storage tank 1.
is connected to the bottom of the. On the other hand, the auxiliary heat source 3 is the hot water storage tank 1
Water is taken in through an inlet pipe 7 at the center of the tank and returned to the inside of the hot water storage tank 1 through an outlet pipe 8. Also, hot water tank 1
Water is supplied into the interior via a distern 9, the amount of water is controlled by a ball tap 1o, and hot water is supplied from the hot water storage tank 1 to the place of use via a hot water pump 11.

In the above configuration, during the day, the heat collected by the solar heat collector 2 is diffused throughout the hot water storage tank 1, but normally, the portion above the center of the hot water storage tank 1 is heated and kept warm by the auxiliary heat source 3, and the heat collected by the solar heat collector 2 is generally kept warm by the auxiliary heat source 3. ℃, which is higher than the temperature raised by the solar heat collector 2, so the solar heat is stored in the lower part of the hot water storage tank 1. In other words, since the hot water tank 1 is divided into two stages, the capacity of the hot water tank 1 is approximately 4,000 liters or more in case solar heat is not collected most of the time, such as on rainy days. . Therefore, by keeping the upper half of this capacity, 200E, at a temperature of 80°C or higher, it is possible to
This method covers the burden of hot water supply for people.

However, a major challenge for water heaters that utilize solar heat is to minimize fuel consumption in the auxiliary heat source. As mentioned above, in conventional solar water heaters with a heat source, the upper part of the hot water tank 1, about 200p, is kept at a high temperature of 60 to 80 degrees Celsius in preparation for supplying large quantities of hot water such as pouring into a bath, so outside air is drawn from this part. The heat radiation loss to is 200 to 400
There is also KcalA. Therefore, there is a drawback that fuel such as gas or oil is consumed to compensate for this heat radiation loss, regardless of hot water supply. In addition, since the capacity to store hot water using the auxiliary heat source 3 is approximately 2001, the Koaj! /1
The present invention takes into consideration the above-mentioned conventional problems, reduces heat loss in the hot water storage tank, obtains high-temperature water in a short time, and ``The purpose is to reduce maintenance costs and costs.

The basic structure of the present invention to achieve the above object is that a pump is provided in the circulation line starting from the upper part of the hot water storage tank, and the pump is further connected to the hot water storage tank through a first solenoid valve, an outgoing pipe, a solar collector, and a return pipe. A bypass pipe having a second solenoid valve is led out from between the pump and the first solenoid valve and connected to the return pipe, and an inlet pipe is installed at the lower part of the hot water storage tank and an outlet pipe is installed at the upper part. A circulation path is provided through an auxiliary heat source connected to the

The above configuration enables high-temperature hot water to be stored in small amounts for a short time by guiding high-temperature hot water from an auxiliary heat source to the top of the hot-water tank, and also stirs the inside of the hot-water tank by using a pump that circulates inside the solar collector. 6'-' and makes it possible to equalize the temperature of the hot water.

An embodiment of the present invention will be described below based on FIG. 1.

In FIG. 1, the same numbers as mentioned above indicate the same members.

The water circulation path connecting the hot water storage tank 1 and the solar collector 2 starts from the upper part of the hot water storage tank 1 and includes a pump 6, a first electromagnetic valve 12,
Outgoing pipe 4, solar heat collector 2, and hot water storage tank 1 via return pipe 6
It consists of a route that enters the lower part of the hot water tank 1, and a route that enters the lower part of the hot water storage tank 1 via the second solenoid valve 13 provided in the middle of the bypass pipe 1B that connects the pump 6 and the return pipe 4 from just before the first solenoid valve 12. has been done. Water is supplied to the hot water tank 1 through a ball tap 19 and into a conduit 14 to the lower part of the hot water tank 1. The hot water tank 1 is molded with resin, and has a built-in ball tap and gas turn function. A circulation path to the auxiliary heat source 3 is formed by an inlet pipe 7 and an outlet pipe 8 that leads high-temperature hot water to the upper part of the hot water storage tank 1. Hot water is supplied to the place of use by a pump 6 through a hot water supply pipe 16.

In the above configuration, the operation will be explained. First, when collecting heat during the day, open the first solenoid valve 12 and open the second solenoid valve 1.
Close 3. Water is sucked from the upper part of the hot water tank 1 by a pump 6' and supplied to the solar collector 2. The heated water enters the lower part of the hot water tank 1 through a return pipe 6. Around 4 p.m., when the day's heat collection is finished, the temperature of the water in the hot water tank 1 is measured by the thermistor 16.
When the set water temperature is reached -Th, additional heating is performed using the auxiliary heat source 3. In this case, since the outlet pipe 8 is located above the hot water storage tank 1 and only the upper part becomes falsely heated, the first solenoid valve 12 is opened and the second solenoid valve 13 is opened to operate the pump 6. Thereby, the hot water in the hot water storage tank 1 is forcibly circulated, and reheating can be performed while keeping the upper and lower temperature distribution to a minimum. The capacity of the hot water tank 1 is approximately 20,071 cm, and if the number of family members is 4 to 6, it will be a bath.

After the entire hot water storage tank 1 has been heated to the set temperature for showering etc., the pump 6 is stopped and the first. Second solenoid valves 12 and 13 are both closed. When the hot water is running low, the thermistor 17 detects it and the auxiliary heat source 3
However, since the pump 6 is stopped and the capacity of the upper part of the hot water tank 1 is small, hot water is stored in the upper part of the hot water tank 1 within a short time. At night, heat is stored only in the upper part of the hot water storage tank 1, and the hot water is used for washing the bathroom, dishes, etc. until heat collection starts in the morning, and reheating stops after heat collection starts.

Therefore, according to the present invention, the time for storing high-temperature hot water (60-80°C) is short, so that heat radiation loss to the outside air can be minimized. Therefore, unnecessary energy consumption is reduced, so maintenance costs can be reduced. Also, even after using up the hot water once,
Because it has the ability to obtain high-temperature hot water in a short time, the auxiliary heat source can be used just like an instant water heater. Also, since the small amount of hot water at the top of the hot water tank in the morning is used for washing dishes, etc., the inside of the hot water tank is mostly low-temperature p water during the day. Therefore, the temperature of the water supplied to the solar heat collector is also low, and the heat collection efficiency can be increased. In addition, as in the conventional example, approximately 2 o
o1 total 4007! The hot water storage tank does not require a higher hot water storage capacity, and can be used as a hot water storage tank with approximately half the capacity of 2oo/l. Therefore, the hot water tank can be made smaller, and the pole tap,
Even if the sinuturn function is built into the hot water storage tank, the overall height can be kept below approximately 180 to 200 cm due to transportation constraints. This is effective not only for downsizing, but also for reducing manufacturing costs and simplifying construction work.

In addition, if the size is around 120 ol, it is technically possible to mold it in one piece using plastic, and the cost can be significantly reduced compared to conventional hot water storage tanks that are made of metal and have a surface finish such as glass lining. .

As is clear from the above description, the solar hot water supply system of the present invention: (1) Since the time for storing a large amount of high-temperature hot water is short, heat radiation loss is small, and maintenance costs can be reduced.

■ Because the hot water storage tank is used for heat collection and reheating, the capacity can be reduced by about half compared to conventional systems, and manufacturing costs can be reduced.

■ You can get hot water in a short time, so use hot water9.
The waiting time is short even when it is cut short.

This effect can be obtained.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a solar hot water supply system according to an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional solar water supply system. 1... Hot water storage tank, 2... Solar collector, 3... Auxiliary heat source, 4... Outgoing pipe, 6.
...Return pipe, 6...Pump, 7...
...Inlet pipe, 8...Outlet pipe, 12...
・First solenoid valve, 13...Second solenoid valve, 17...
...Thermistor, 18 ... Bypass pipe %1
9...Pole tap 0 Agent's name Patent attorney Toshi Nakao and 1 other person-2
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Claims (3)

[Claims] (1) A pump is provided in the circulation line starting from the upper part of the hot water storage tank, then a 1' solenoid valve is provided, a return pipe is connected to the lower part of the hot water storage tank via the outgoing pipe and the solar heat collector, and the pump A bypass pipe is connected to the return pipe from between the first solenoid valve and the second solenoid valve, and a solar heating side circulation path is provided in the pipeline, and an inlet pipe is connected to the lower part of the hot water storage tank, and an inlet pipe is connected to the upper part of the hot water storage tank. 1. A solar water heating device characterized by having a circulation path via an auxiliary heat source connected to an outlet pipe. (2) The solar hot water supply device according to claim 1, wherein the hot water storage tank is molded from a polymer compound such as plastics. (3) Claim 1, which is characterized by having a ball tap inside and a hot water storage tank that also serves as a gas tank.
The solar water heating device described in Section 1.